//
// Created by wujehy on 2020/8/23.
//

#include <chrono>
#include "Common.h"
#include "boost/uuid/uuid.hpp"
#include "boost/uuid/uuid_io.hpp"
#include "boost/uuid/uuid_generators.hpp"
#include <boost/algorithm/hex.hpp>
#include <boost/uuid/detail/md5.hpp>
//using namespace GeeJoan;
namespace GeeJoan{
    namespace Common{

        std::string get_uuid()
        {
            boost::uuids::uuid a_uuid = boost::uuids::random_generator()(); // 这里是两个() ，因为这里是调用的 () 的运算符重载
            std::string tmp_uuid = boost::uuids::to_string( a_uuid );
            return tmp_uuid;
        }
        int64_t getTimeMicro()
        {
            std::chrono::time_point<std::chrono::system_clock> p = std::chrono::system_clock::now();
            return std::chrono::duration_cast<std::chrono::microseconds>(p.time_since_epoch()).count();
        }

        int64_t getTimeMilli()
        {
            return getTimeMicro() / 1000;
        }

        std::string Base64Encode(const unsigned char *Data, int DataByte)
        {
            //编码表
            const char EncodeTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
            //返回值
            std::string strEncode;
            unsigned char Tmp[4] = {0};
            int LineLength = 0;
            for (int i = 0; i < (int) (DataByte / 3); i++) {
                Tmp[1] = *Data++;
                Tmp[2] = *Data++;
                Tmp[3] = *Data++;
                strEncode += EncodeTable[Tmp[1] >> 2];
                strEncode += EncodeTable[((Tmp[1] << 4) | (Tmp[2] >> 4)) & 0x3F];
                strEncode += EncodeTable[((Tmp[2] << 2) | (Tmp[3] >> 6)) & 0x3F];
                strEncode += EncodeTable[Tmp[3] & 0x3F];
                if (LineLength += 4, LineLength == 76) {
                    strEncode += "\r\n";
                    LineLength = 0;
                }
            }
            //对剩余数据进行编码
            int Mod = DataByte % 3;
            if (Mod == 1) {
                Tmp[1] = *Data++;
                strEncode += EncodeTable[(Tmp[1] & 0xFC) >> 2];
                strEncode += EncodeTable[((Tmp[1] & 0x03) << 4)];
                strEncode += "==";
            } else if (Mod == 2) {
                Tmp[1] = *Data++;
                Tmp[2] = *Data++;
                strEncode += EncodeTable[(Tmp[1] & 0xFC) >> 2];
                strEncode += EncodeTable[((Tmp[1] & 0x03) << 4) | ((Tmp[2] & 0xF0) >> 4)];
                strEncode += EncodeTable[((Tmp[2] & 0x0F) << 2)];
                strEncode += "=";
            }

            return strEncode;
        }

        std::string Base64Decode(const char *Data, int DataByte, int &OutByte)
        {
            //解码表
            const char DecodeTable[] =
                    {
                            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                            62, // '+'
                            0, 0, 0,
                            63, // '/'
                            52, 53, 54, 55, 56, 57, 58, 59, 60, 61, // '0'-'9'
                            0, 0, 0, 0, 0, 0, 0,
                            0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
                            13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // 'A'-'Z'
                            0, 0, 0, 0, 0, 0,
                            26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
                            39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, // 'a'-'z'
                    };
            //返回值
            std::string strDecode;
            int nValue;
            int i = 0;
            while (i < DataByte) {
                if (*Data != '\r' && *Data != '\n') {
                    nValue = DecodeTable[*Data++] << 18;
                    nValue += DecodeTable[*Data++] << 12;
                    strDecode += (nValue & 0x00FF0000) >> 16;
                    OutByte++;
                    if (*Data != '=') {
                        nValue += DecodeTable[*Data++] << 6;
                        strDecode += (nValue & 0x0000FF00) >> 8;
                        OutByte++;
                        if (*Data != '=') {
                            nValue += DecodeTable[*Data++];
                            strDecode += nValue & 0x000000FF;
                            OutByte++;
                        }
                    }
                    i += 4;
                } else// 回车换行,跳过
                {
                    Data++;
                    i++;
                }
            }
            return strDecode;
        }

        bool GetMd5(std::string &str_md5, const char *const buffer, size_t buffer_size)
        {
            if (buffer == nullptr)
            {
                return false;
            }
            boost::uuids::detail::md5 boost_md5;
            boost_md5.process_bytes(buffer, buffer_size);
            boost::uuids::detail::md5::digest_type digest;
            boost_md5.get_digest(digest);
            const auto char_digest = reinterpret_cast<const char*>(&digest);
            str_md5.clear();
            boost::algorithm::hex(char_digest,char_digest+sizeof(boost::uuids::detail::md5::digest_type), std::back_inserter(str_md5));
            return true;
        }


        bool GetPathFileNameAndFilePath(const std::string &allPath, std::string &filePath, std::string &filename, bool isUnix )
        {
            std::string lastkeywork;
            if (isUnix)
            {
                lastkeywork = "/";
            } else
            {
                lastkeywork = "\\";
            }
            int pos = allPath.find_last_of(lastkeywork);
            std::string s(allPath.substr(pos + 1));
            filename = s;
            filePath = std::string(allPath.substr(0, pos));
            if (filename.empty())
            {
                return false;
            }
            return true;
        }


        const std::string HexCode = "0123456789ABCDEF";

        std::string  StringToHex(const std::string &data)
        {
            std::string result;
            uint8_t currTemp = 0;
            for (int i = 0; i < data.size(); ++i)
            {
                currTemp = data[i] & 0xff;
                result.push_back( HexCode[currTemp >> 4] );
                result.push_back( HexCode[currTemp & 0x0f] );
            }
            return result;
        }

        std::string  HexToString(const std::string &data)
        {
            std::string result;
            for (int i = 0; i < data.length(); i += 2)
            {
                std::string byte = data.substr( i, 2 );
                char chr = (char) strtol( byte.c_str(), NULL, 16 );
                result.push_back( chr );
            }
            return result;
        }

    }
}